is#command_based_interface__commandbasedinterface
  supertype:  is#non-graphical_user_interface
  subtype:  is#network-accessible_command_based_interface
     subtype:  is#OKBC_interface
     subtype:  is#CGI-accessible_command_based_interface
  subtype:  is#direct_command_based_interface__shell
     subtype:  is#sh
     subtype:  is#ksh
     subtype:  is#csh

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